{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T22:41:06Z","timestamp":1777588866427,"version":"3.51.4"},"reference-count":47,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2016,4,8]],"date-time":"2016-04-08T00:00:00Z","timestamp":1460073600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100000065","name":"the National Institute of Neurological Disorders and Stroke","doi-asserted-by":"crossref","award":["U24 NS072026"],"award-info":[{"award-number":["U24 NS072026"]}],"id":[{"id":"10.13039\/100000065","id-type":"DOI","asserted-by":"crossref"}]},{"name":"the National Institute on Aging","award":["(P30 AG19610 Arizona Alzheimer's Disease Core Center)"],"award-info":[{"award-number":["(P30 AG19610 Arizona Alzheimer's Disease Core Center)"]}]},{"DOI":"10.13039\/100007306","name":"the Arizona Department of Health Services","doi-asserted-by":"crossref","award":["(211002, Arizona Alzheimer's Research Center)"],"award-info":[{"award-number":["(211002, Arizona Alzheimer's Research Center)"]}],"id":[{"id":"10.13039\/100007306","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/100008335","name":"the Arizona Biomedical Research Commission","doi-asserted-by":"crossref","award":["4001, 0011, 05-901, and 1001"],"award-info":[{"award-number":["4001, 0011, 05-901, and 1001"]}],"id":[{"id":"10.13039\/100008335","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Movement Disorders"],"published-print":{"date-parts":[[2016,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>Quantitative EEG features have been identified as surrogates and predictors of cognitive decline\/dementia, a common feature of progressive PD. The biochemical correlates for altered quantitative EEG features are unknown. Our primary objective was to test the hypothesis that quantitative EEG measures correlate with cortical levels of phosphorylated \u03b1\u2010synuclein, a modified form of the synaptic protein \u03b1\u2010synuclein, in PD cases, in contrast to other pathology\u2010associated proteins. A secondary objective was to explore the same correlations among cellular fractions of these proteins.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We used posterior cingulate cortex autopsy tissue from 44 PD subjects with various degrees of cognitive decline, who had undergone EEG. In this brain region, which is a major hub of the default mode network, biochemical measurements for levels of phosphorylated \u03b1\u2010synuclein, unmodified \u03b1\u2010synuclein, amyloid beta peptide, phosphorylated tau, and key synaptic proteins were analyzed and data correlated with spectral EEG measures.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Findings revealed significant correlations between background rhythm peak frequency and all bandpower values (highest in delta bandpower) with total phosphorylated \u03b1\u2010synuclein, but not any correlation with total \u03b1\u2010synuclein, phosphorylated tau protein, amyloid beta peptide, or synaptic proteins. Certain fractions of synaptosomal\u2010associated protein 25 showed correlation with some quantitative EEG measures.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>These data show an association between increased phosphorylation of \u03b1\u2010synuclein and the abnormal EEG signatures of cognitive decline. Results suggest that quantitative EEG may provide an in vivo approximation of phosphorylated \u03b1\u2010synuclein in PD cortex. This adds to previous evidence that quantitative EEG measures can be considered valid biomarkers of PD cognitive decline. \u00a9 2016 International Parkinson and Movement Disorder Society<\/jats:p><\/jats:sec>","DOI":"10.1002\/mds.26621","type":"journal-article","created":{"date-parts":[[2016,4,10]],"date-time":"2016-04-10T14:15:01Z","timestamp":1460297701000},"page":"1012-1019","source":"Crossref","is-referenced-by-count":36,"title":["Cortical phosphorylated \u03b1\u2010Synuclein levels correlate with brain wave spectra in Parkinson's disease"],"prefix":"10.1002","volume":"31","author":[{"given":"John N.","family":"Caviness","sequence":"first","affiliation":[{"name":"Department of Neurology Mayo Clinic Scottsdale Arizona USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lih\u2010Fen","family":"Lue","sequence":"additional","affiliation":[{"name":"Laboratories of Neuroregeneration and Neuroinflammation Banner\u2010Sun Health Research Institute Sun City Arizona 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